package roba

import (
	"bufio"
	"bytes"
	"fmt"
	"io"
	"os"
	"strconv"
	"strings"
)

type Tile byte

const (
	TileWall = '#'
)

type Layout struct {
	Height int
	Width  int
	layout [][]byte
}

type Map interface {
	DebugPrint()
}

func NewMap(path string) (Map, error) {
	m := &Layout{}
	f, err := os.Open(path)
	if err != nil {
		return nil, err
	}
	br := bufio.NewReader(f)
	buf, err := br.ReadString('\n')
	buf = strings.TrimRight(buf, "\n")
	if err != nil {
		return nil, err
	}
	s := strings.Split(buf, " ")
	m.Width, err = strconv.Atoi(s[0])
	if err != nil {
		return nil, err
	}
	m.Height, err = strconv.Atoi(s[1])
	if err != nil {
		return nil, err
	}
	for j := 0; j < m.Height; j++ {
		b, err := br.ReadBytes('\n')
		if err == io.EOF {
			b = bytes.Repeat([]byte{TileWall}, m.Width)
		}
		if len(b) < m.Width {
			bytes.TrimRight(b, "\n")
			b = append(b, bytes.Repeat([]byte{TileWall}, m.Width-len(b))...)
		}
		if len(b) > m.Width {
			b = b[:m.Width]
		}
		m.layout = append(m.layout, b)
	}
	return m, nil
}

func (l *Layout) DebugPrint() {
	for _, x := range l.layout {
		fmt.Println(string(x))
	}
}